The man of the future will approach plants that are of use to him consciously; not as now when he reflects on which yield the best substances for his body; he will then have a vital relationship to every plant, for he will know what it is they have absorbed, and what passes from them to him. Eating will not be to him a mean occupation, but an act consummated with soul and spirit, for he will know that everything he eats is the external form of something spiritual. In our immediate age, when men know little about the vital inward relations between themselves and the world, all kinds of substitutes are made use of. Why have the Initiates of all ages urged people to say grace before eating? The grace should be a token of the recognition that, together with the food, something spiritual enters into man.
Source: Rudolf Steiner – GA 105 – Universe, Earth and Man – Lecture III – Stuttgart, 6th August 1908